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5 Message Communications
CompoNet Communications Unit User’s Manual (I582-E1)
5-2
Sendi
ng Me
ssages f
rom
CS/CJ-s
er
ies
5
5-
2-2 When to
Issue/Rea
d an Exp
licit Messa
ge
C: First Word Address of Control Data
Set the first word address to configure the required control data for Message communications.
The CompoNet Master Unit requires to be previously set the following control data to consecutive
word addresses.
*1 Set how many bytes the command data storage area occupies from the first word address S.
*2 Set how many bytes the response data storage area occupies from the first word address D.
*3 In word address C + 4, bit 15, set whether the response is required (0) or not required (1).
For Explicit Messages, this must be set to 0 (Response required).
*4 Set the port used for CompoNet.
*5 Set the how many times the message is to be resent in case of an error response.
*6 For Explicit Messages, this must be set to 2 seconds or more.
An example of input conditions for issuing the CMND instruction is shown below. Note that the CMND
instruction can be executed only once per communications port. Do not execute the CMND instruction
when the Network Communications Command Execution Enabled Flag corresponding to each port is
set to 0 (OFF).
The CMND instruction must be issued with a condition which the CS/CJ-series unit's Network Commu-
nications Command Execution Enabled Flag is set.
Word Address
Bit No.
15
14 to 8
7 to 0
C
Number of bytes of command data: 0000 to 021E hex (0 to 542 bytes)
*1
C + 1
Number of bytes of response data: 0000 to 021E hex (0 to 542 bytes)
*2
C + 2
Network address: 0000 hex (0)
C + 3
Command destination node address
: 00 hex (0)
Command destination unit address
: 20 to 7F hex (Unit No. 0 to 95(00 to
5F hex) + 20 hex)
C + 4
Response
*3
Communications port number:
0 to 7
*4
Number of resends: 00 to 0F hex
(0 to 15)
*5
C + 5
Response monitor time:
0000 hex
→
2 s 0001 to FFFF hex
→
0.1 to 6553.5 s [in units of 0.1 s]
*6
5-2-2
When to Issue/Read an Explicit Message
When to Issue an Explicit Message
(↑) CMND (490)
S
D
C
Command Execution
Condition
Network Communications
Command Execution Enabled Flag
Summary of Contents for 3G3AX-MX2-CRT-E
Page 94: ...3 Network Startup 3 36 CompoNet Communications Unit User s Manual I582 E1...
Page 118: ...4 Remote I O 4 24 CompoNet Communications Unit User s Manual I582 E1...
Page 134: ...5 Message Communications 5 16 CompoNet Communications Unit User s Manual I582 E1...
Page 167: ...I 1 I CompoNet Communications Unit User s Manual I582 E1 Index...
Page 171: ......